Decades ago, musicals were all the rage in Hollywood. Some of the biggest stars in the world were actors and actresses known for their impressive pipes and mesmerizing dance steps, like Fred Astaire and Ginger Rogers. Now Whiplash director Damien Chazelle is bringing back that classic style in the modern musical La La Land starring Emma Stone and Ryan Gosling, and a new featurette goes behind the scenes to show how they’re making it happen.